CN214407343U

CN214407343U - Detection device

Info

Publication number: CN214407343U
Application number: CN202023285430.2U
Authority: CN
Inventors: 谢卫锋; 江帆; 梁国辉; 曹小建; 孙杰; 尹建刚; 李燕选; 高云峰
Original assignee: Han s Laser Technology Industry Group Co Ltd
Current assignee: Han s Laser Technology Industry Group Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-10-15
Anticipated expiration: 2030-12-29

Abstract

The embodiment of the utility model discloses check out test set relates to the product test field. This check out test set, the adoption is connected camera subassembly and laser mechanism and frame, the tool that will be used for fixed product that awaits measuring through actuating mechanism removes to detecting the station, the camera subassembly can snatch the product profile that awaits measuring and discern the product position that awaits measuring, the laser mechanism can detect the difference in height of the product that awaits measuring, thereby the removal of camera subassembly and laser mechanism has been avoided in the difference in height testing process, thereby avoid taking place between camera subassembly and laser mechanism and the hookup location not hard up, hookup location changes, and then the precision that the product difference in height detected has been guaranteed.

Description

Detection device

Technical Field

The utility model relates to a product test field especially relates to a check out test set.

Background

Most of the existing detection equipment moves a detection device to a detection position through a driving device so as to detect the height difference of a product. The connection position of the driving device and the detection device is easy to loosen in the process that the driving device drives the detection device to move for many times, so that the positions of the driving device and the detection device are changed, and the detection precision of the height difference of the product is further influenced.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a detection apparatus, and the purpose is to solve the technical problem that the position of the driving device and the detection device is changed due to looseness between the detection apparatus and the driving device during the moving process of the existing detection apparatus, and further the precision of the height difference detection of the product is affected.

In order to solve the technical problem, the utility model discloses a technical scheme be:

a detection apparatus, comprising:

a frame;

the jig is used for fixing a product to be tested;

the driving mechanism is connected with the rack and can move the jig to a detection station;

the camera component is connected with the rack and used for grabbing the outline of the product to be detected and identifying the position of the product to be detected; and

the laser mechanism is connected with the rack and used for detecting the height difference of the product to be detected.

In some embodiments of the detection apparatus, the driving mechanism includes a first driving component and a second driving component, the first driving component is connected to the frame, the second driving component is connected to the first driving component, the first driving component is configured to drive the second driving component to move along a first direction, the jig is connected to the second driving component, the second driving component is configured to drive the jig to move along a second direction, and the first direction is perpendicular to the second direction.

In some embodiments of the detection apparatus, the laser mechanism includes a first distance meter and a second distance meter, the first distance meter and the second distance meter are located detect station both sides and set up relatively, the first distance meter is used for detecting the difference in height of the first side of the product to be detected, the second distance meter is used for detecting the difference in height of the second side of the product to be detected.

In some embodiments of the detection apparatus, the laser mechanism further includes a first fine tuning component and a second fine tuning component, the first distance meter is connected to the frame through the first fine tuning component, the first fine tuning component is configured to drive the first distance meter to move relative to the second distance meter along a third direction, the second distance meter is connected to the frame through the second fine tuning component, the second fine tuning component is configured to drive the second distance meter to move relative to the first distance meter along the third direction, and the third direction is perpendicular to a plane where the first direction and the second direction are located.

In some embodiments of the detection apparatus, the fixture includes a body and a clamping mechanism, the body is provided with a through hole, the through hole is used for exposing the first side and the second side to the body, the clamping mechanism is annularly disposed on the through hole and connected to the body, and the clamping mechanism is used for clamping the product to be detected.

In some embodiments of the detection apparatus, the clamping mechanism includes a first clamping assembly and a second clamping assembly, the first clamping assembly includes a first fixed part and a first moving part, the first moving part is movable relative to the first fixed part to clamp the product to be detected, the second clamping assembly includes a second fixed part and a second moving part, and the second moving part is movable relative to the second fixed part to clamp the product to be detected.

In some embodiments of the detection apparatus, the clamping mechanism further includes a sliding part and a rotating part, the first moving part is slidably connected to the body through the sliding part and can move relative to the first fixing part to clamp the product to be detected, and the second moving part is rotatably connected to the body through the rotating part and can move relative to the second fixing part to clamp the product to be detected.

In some embodiments of the detection apparatus, the clamping mechanism further includes a first limiting member and a second limiting member, the first limiting member is slidably connected to the body, the first limiting member is configured to limit a position of the first moving member moving in a direction away from the first fixing member, the second limiting member is slidably connected to the body, and the second limiting member is configured to limit a position of the second moving member moving in a direction away from the second fixing member.

In some embodiments of the detection apparatus, the body includes a first housing and a second housing, an accommodating space is formed between the first housing and the second housing, the sliding member, the rotating member, the first limiting member and the second limiting member are all accommodated in the accommodating space, the first moving member extends from the accommodating space and is exposed to the second housing, and the second moving member extends from the accommodating space and is exposed to the second housing.

In some embodiments of the detection apparatus, the detection apparatus further includes a support plate, the support plate is provided with a through groove coaxially communicated with the through hole, one side of the support plate is provided with a stopping portion, the body is connected with the second driving assembly through the support plate, a first outer hole is formed in the body in the moving direction of the first limiting member, a second outer hole is formed in the body in the moving direction of the second limiting member, the first outer hole and the second outer hole are located on the same side of the body and are opposite to the stopping portion, and the stopping portion is used for limiting the extension amount of the first limiting member from the first outer hole and limiting the extension amount of the second limiting member from the second outer hole.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

above-mentioned check out test set, the adoption is connected camera subassembly and laser mechanism and frame, the tool that will be used for fixed product that awaits measuring through actuating mechanism removes to detecting the station, the camera subassembly can snatch the product profile that awaits measuring and discern the product position that awaits measuring, the laser mechanism can detect the difference in height of the product that awaits measuring, thereby the removal of camera subassembly and laser mechanism has been avoided in the difference in height testing process, thereby avoid taking place between camera subassembly and laser mechanism and the hookup location not hard up, hookup location changes, and then the precision that the product difference in height detected has been guaranteed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

FIG. 1 is a schematic view of a detection apparatus in one embodiment;

FIG. 2 is a schematic view of the assembly of the jig, the driving mechanism, the camera assembly and the laser mechanism in the inspection apparatus shown in FIG. 1;

FIG. 3 is a schematic view of the assembly of the jig and the driving mechanism in the inspection apparatus shown in FIG. 1;

FIG. 4 is a schematic view of a jig in the inspection apparatus shown in FIG. 1;

fig. 5 is a schematic view of the jig shown in fig. 4 with the second housing removed.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 5, a detection apparatus 10 according to an embodiment of the present invention will now be described. The embodiment of the utility model provides a check out test set 10 is used for detecting the difference in height of product 20. In this embodiment, product 20 is the panel computer shell that has the LOGO, and check out test set 10 specifically is used for detecting the difference in height between LOGO and the panel computer shell body. The inspection apparatus 10 includes a frame 100, a jig 200, a driving mechanism 300, a camera assembly 400, and a laser mechanism 500. The fixture 200 is used for fixing the product 20 to be tested. The driving mechanism 300 is connected to the frame 100, and the driving mechanism 300 can move the jig 200 to the detection station. The camera assembly 400 is connected to the frame 100, and the camera assembly 400 is used for capturing the outline of the product 20 to be tested and identifying the position of the product 20 to be tested. The laser mechanism 500 is connected to the rack 100, and the laser mechanism 500 is used for detecting the height difference of the product 20 to be detected. Above-mentioned check out test set 10, the adoption is connected camera subassembly 400 and laser mechanism 500 with frame 100, will be used for fixed product 20 that awaits measuring tool 200 to remove to detecting the station through actuating mechanism 300, camera subassembly 400 can snatch the product 20 profile that awaits measuring and discern the product 20 position that awaits measuring, laser mechanism 500 can detect the difference in height of the product 20 that awaits measuring, thereby camera subassembly 400 and laser mechanism 500's removal has been avoided in the difference in height testing process, thereby avoid taking place between camera subassembly 400 and laser mechanism 500 and the hookup location not hard up, hookup location changes, and then the precision that the product 20 difference in height detected has been guaranteed.

As shown in fig. 2 and 3, in one embodiment, the driving mechanism 300 includes a first driving assembly 310 and a second driving assembly 320, the first driving assembly 310 is connected to the frame 100, the second driving assembly 320 is connected to the first driving assembly 310, the first driving assembly 310 is used for driving the second driving assembly 320 to move along a first direction, the jig 200 is connected to the second driving assembly 320, and the second driving assembly 320 is used for driving the jig 200 to move along a second direction, the first direction is perpendicular to the second direction. Therefore, the jig 200 can move in the plane where the first direction and the second direction are located conveniently, and the jig 200 can be moved to the detection station only according to the plane coordinate of the detection station. Meanwhile, the jig 200 moves in a translation mode, so that the jig 200 can be prevented from rotating or overturning, the difficulty of fixing the product 20 to be tested by the jig 200 is reduced, the cost is saved, the force of the jig 200 for fixing the product 20 to be tested can be reduced, and the risk of scratching the product 20 to be tested is reduced. It is understood that in other embodiments, the driving mechanism 300 may also be a three-axis or more-than-three-axis driving mechanism.

Continuing to refer to FIG. 2, in one embodiment, the laser mechanism 500 includes a first range finder 510 and a second range finder 520. In this embodiment, the first distance meter 510 and the second distance meter 520 are both laser distance meters. First distancer 510 and second distancer 520 are located detection station both sides and relative setting, and first distancer 510 is used for detecting the difference in height of the first side of the product 20 that awaits measuring, and second distancer 520 is used for detecting the difference in height of the second side of the product 20 that awaits measuring. So set up the both sides that can await measuring product 20 simultaneously and detect, improve detection efficiency, simultaneously, avoid with the product 20 upset that awaits measuring, reduce the time of refocusing the detection, practiced thrift the time cost. It is understood that in other embodiments, the laser mechanism 500 may include a plurality of other rangefinders that may simultaneously detect a plurality of different sides of the product 20 being tested.

In one embodiment, laser mechanism 500 further comprises a first fine tuning assembly 530 and a second fine tuning assembly 540, wherein first rangefinder 510 is coupled to frame 100 via first fine tuning assembly 530, first fine tuning assembly 530 is configured to drive first rangefinder 510 to move relative to second rangefinder 520 in a third direction, second rangefinder 520 is coupled to frame 100 via second fine tuning assembly 540, and second fine tuning assembly 540 is configured to drive second rangefinder 520 to move relative to first rangefinder 510 in the third direction, the third direction being perpendicular to the plane of the first direction and the second direction. In this embodiment, the first direction is parallel to the direction indicated by the arrow X in fig. 2, the second direction is parallel to the direction indicated by the arrow Y in fig. 2, and the third direction is parallel to the direction indicated by the arrow Z in fig. 2. The positions of the first distance meter 510 and the second distance meter 520 relative to the product 20 to be measured can be precisely adjusted by the first fine tuning assembly 530 and the second fine tuning assembly 540 to obtain more accurate measurement results. Meanwhile, the moving speed of the first fine tuning assembly 530 and the second fine tuning assembly 540 during fine tuning the positions of the first distance meter 510 and the second distance meter 520 is slow, so that the phenomenon that the connection positions of the first fine tuning assembly 530 and the second fine tuning assembly 540 and the first distance meter 510 and the second distance meter 520 are changed due to looseness caused by inertia and the influence on the detection precision of the height difference of the product 20 is caused can be avoided. In this embodiment, the third direction is parallel to the gravity direction of the first distance meter 510 and the second distance meter 520, so as to further prevent the joint from loosening.

Referring to fig. 2 to 5, on the basis of the above embodiment, the fixture 200 includes a main body 210 and a clamping mechanism 220, the main body 210 has a through hole 230, the through hole 230 is used for exposing the first side and the second side to the main body 210, the clamping mechanism 220 is disposed around the through hole 230 and connected to the main body 210, and the clamping mechanism 220 is used for clamping the product 20 to be tested. This may facilitate detection of the first and second sides by first and

second rangefinders

510 and 520. The clamping mechanism 220 can clamp the product 20 to be detected to ensure that the product 20 to be detected does not displace relative to the jig 200 in the process of moving to the detection station along with the jig 200, and ensure that the product 20 to be detected can be accurately moved into the detection station in the process.

Further, the clamping mechanism 220 comprises a first clamping assembly and a second clamping assembly, the first clamping assembly comprises a first fixed part 221 and a first moving part 222, the first moving part 222 can move relative to the first fixed part 221 to clamp the product 20 to be tested, the second clamping assembly comprises a second fixed part 223 and a second moving part 224, and the second moving part 224 can move relative to the second fixed part 223 to clamp the product 20 to be tested. The positioning reference of the product 20 to be measured is ensured by the arrangement of the first fixing member 221 and the second fixing member 223. Meanwhile, the positions of the first moving part 222 and the second moving part 224 can be adjusted to adapt to the sizes of different products 20 to be tested and clamp the products 20 to be tested on the first fixing part 221 and the second fixing part 223, so that the movement of the products 20 to be tested relative to the body 210 is limited, and the accuracy of subsequent detection is further ensured.

On the basis of the above series of embodiments, the clamping mechanism 220 further includes a sliding part 225 and a rotating part 226, the first moving part 222 is slidably connected to the body 210 through the sliding part 225 and can move relative to the first fixing part 221 to clamp the product 20 to be tested, and the second moving part 224 is rotatably connected to the body 210 through the rotating part 226 and can move relative to the second fixing part 223 to clamp the product 20 to be tested. The control by the sliding member 225 and the rotating member 226 can ensure the moving stability of the first moving member 222 and the second moving member 224 and limit the moving path of the first moving member 222 and the second moving member 224.

Further, the clamping mechanism 220 further includes a first limiting member 227 and a second limiting member 228, the first limiting member 227 is slidably connected to the main body 210, the first limiting member 227 is used for limiting a position of the first moving member 222 moving away from the first fixing member 221, the second limiting member 228 is slidably connected to the main body 210, and the second limiting member 228 is used for limiting a position of the second moving member 224 moving away from the second fixing member 223. Therefore, the distance between the first moving part 222 and the second moving part 224 away from the clamping position can be limited, and the efficiency of subsequently clamping the product 20 to be tested is improved. Specifically, the first limiting member 227 is integrated with the sliding member 225. The rotation member 226 rotates relative to the body 210 to touch the second position-limiting member 228 to move relative to the body. In addition, a restoring member may be disposed between the first limiting member 227 and the body 210 and between the second limiting member 228 and the body 210, so as to ensure that the first limiting member 227 and the second limiting member 228 can restore to the original positions when the first moving member 222 and the second moving member 224 are not subjected to an external force.

In some embodiments, the sliding member 225, the rotating member 226, the first limiting member 227 and the second limiting member 228 can be exposed on the body 210. In the present embodiment, in order to protect the sliding member 225, the rotating member 226, the first limiting member 227 and the second limiting member 228, the sliding member 225, the rotating member 226, the first limiting member 227 and the second limiting member 228 are selectively accommodated in an accommodating space. Specifically, the body 210 includes a first housing 211 and a second housing 212, the aforementioned receiving space is formed between the first housing 211 and the second housing 212, the sliding member 225, the rotating member 226, the first limiting member 227 and the second limiting member 228 are all received in the receiving space, the first moving member 222 extends from the receiving space and is exposed to the second housing 212, and the second moving member 224 extends from the receiving space and is exposed to the second housing 212. Therefore, the sliding member 225, the rotating member 226, the first limiting member 227 and the second limiting member 228 can be protected from the outside to influence the transmission of the above components. Further, a supporting portion 2111 is disposed on the first housing 211, the supporting portion 2111 is disposed around the through hole 230 and exposed to the second housing 212, and the supporting portion 2111 is used for supporting the product 20 to be tested, so as to facilitate the positioning of the product 20 to be tested in the third direction. Meanwhile, the supporting portion 2111 may be made of an elastic material or provided with an elastic layer to avoid scratching the product 20.

Further, the detecting apparatus 10 further includes a supporting plate 600, the supporting plate 600 is provided with a through slot coaxially communicated with the through hole 230, one side of the supporting plate 600 is provided with a stopping portion 610, the main body 210 is connected with the second driving assembly 320 through the supporting plate 600, the main body 210 is provided with a first outer hole 213 in the moving direction of the first limiting member 227, the main body 210 is provided with a second outer hole 214 in the moving direction of the second limiting member 228, the first outer hole 213 and the second outer hole 214 are located on the same side of the main body 210 and are arranged opposite to the stopping portion 610, and the stopping portion 610 is used for limiting the extending amount of the first limiting member 227 from the first outer hole 213 and limiting the extending amount of the second limiting member 228 from the second outer hole 214. The stopping portion 610 is disposed on one side of the supporting plate 600, and can serve as a reinforcing rib plate to improve rigidity of the supporting plate 600, so that the jig 200 is prevented from shaking during moving. When the main body 210 is machined, a moving space for the first limiting member 227 and the second limiting member 228 is required to be machined, and the moving space is also a space for limiting the movement of the first limiting member 227 and the second limiting member 228, so that a certain machining precision is required to be ensured on the inner wall enclosing the moving space. Forming the first outer hole 213 and the second outer hole 214 by exposing one end of the moving space outside the body 210 can eliminate the need to process one end of the moving space, thereby reducing the cost of processing the body 210.

As shown in fig. 2, based on the above embodiment, the camera assembly 400 includes an adjusting plate 410, a first connecting plate 420, a camera 430, a second connecting plate 440 and a light source 450, the camera 430 is disposed on the adjusting plate 410 through the first connecting plate 420, the light source 450 is disposed on the adjusting plate 410 through the second connecting plate 440, the adjusting plate 410 is connected to the frame 100 through the vertical plate 700, the light source 450 is used for illuminating the product 20 to be tested, and the camera 430 is used for grabbing the profile of the product 20 to be tested and identifying the position of the product 20 to be tested. The product 20 to be tested is illuminated by the light source 450 to ensure the accuracy of the camera 430 in grasping the outline of the product 20 to be tested and identifying the position of the product 20 to be tested. In the present embodiment, the light source 450 is a ring-shaped light source 450 and is disposed coaxially with the camera 430. The light source 450 is located between the camera 430 and the product 20 to be tested, and can ensure the uniformity of the light spots formed on the product 20 to be tested without obstructing the view of the camera 430. The camera 430 and the light source 450 can adjust their positions on the riser 700 through the adjustment plate 410 to adjust the light paths of the camera 430 and the light source 450. The vertical plate 700 is provided with an avoiding groove 710, and the avoiding groove 710 is used for avoiding the jig 200 and avoiding the vertical plate 700 from limiting the moving path of the jig 200.

Further, the inspection apparatus 10 further comprises a control system for controlling the driving mechanism 300 to move the jig 200 to the inspection station and controlling the first fine tuning assembly 530 and the second fine tuning assembly 540 to perform fine tuning on the first distance meter 510 and the second distance meter 520, respectively. In addition, the control system can also receive the profile of the product 20 to be measured captured by the camera 430 and identify the position information of the product 20 to be measured, so as to control the driving mechanism 300 to move the jig 200, and control the first fine tuning assembly 530 and the second fine tuning assembly 540 to perform fine tuning on the first distance meter 510 and the second distance meter 520 respectively, so as to realize focusing before detection of the product 20 to be measured, and obtain a more accurate measurement result. The measurement results obtained by measuring with first distance meter 510 and second distance meter 520, for example, the height difference of a plurality of test point positions on the LOGO can be sent to the control system, and the measurement results are calculated and analyzed by using software built in the control system, so as to obtain the height difference of the LOGO.

Further, the rack 100 includes a lower rack 110, an upper cover 120, a platen 130, a display stand 140, a keyboard 150, a mouse, a display 160, a power switch, and a power supply board. The platen 130 is disposed above the lower frame 110, the driving mechanism 300 and the vertical plate 700 are disposed on the platen 130, and the outer side is covered with the upper cover 120, thereby defining a detection area and preventing an external environment from affecting a detection result. The display holder 140 can embed the display 160 in the outer wall of the upper housing 120, and the same keyboard 150 and mouse (not shown) can be embedded in the outer wall of the upper housing 120 when not in use, so as to prevent the unfolded keyboard 150 from being damaged by the impact of the external environment when the detection apparatus 10 is moved. The power switch is exposed from the platen 130 for easy operation by a human operator. The wire feeding plate is accommodated in the lower housing 110.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A detection apparatus, comprising:

a frame;

the jig is used for fixing a product to be tested;

2. The inspection apparatus of claim 1, wherein the driving mechanism includes a first driving assembly and a second driving assembly, the first driving assembly is connected to the frame, the second driving assembly is connected to the first driving assembly, the first driving assembly is configured to drive the second driving assembly to move along a first direction, the jig is connected to the second driving assembly, the second driving assembly is configured to drive the jig to move along a second direction, and the first direction is perpendicular to the second direction.

3. The detection apparatus according to claim 2, wherein the laser mechanism includes a first distance meter and a second distance meter, the first distance meter and the second distance meter are located on two sides of the detection station and are arranged oppositely, the first distance meter is used for detecting a height difference of a first side of the product to be detected, and the second distance meter is used for detecting a height difference of a second side of the product to be detected.

4. The detection device according to claim 3, wherein the laser mechanism further comprises a first fine adjustment component and a second fine adjustment component, the first distance meter is connected with the frame through the first fine adjustment component, the first fine adjustment component is used for driving the first distance meter to move along a third direction relative to the second distance meter, the second distance meter is connected with the frame through the second fine adjustment component, the second fine adjustment component is used for driving the second distance meter to move along the third direction relative to the first distance meter, and the third direction is perpendicular to a plane where the first direction and the second direction are located.

5. The detection device according to claim 3 or 4, wherein the jig comprises a body and a clamping mechanism, the body is provided with a through hole, the through hole is used for exposing the first side and the second side to the body, the clamping mechanism is annularly arranged on the through hole and connected with the body, and the clamping mechanism is used for clamping the product to be detected.

6. The inspection apparatus of claim 5, wherein the clamping mechanism includes a first clamping assembly and a second clamping assembly, the first clamping assembly includes a first fixed member and a first moving member, the first moving member is movable relative to the first fixed member to clamp the product to be inspected, the second clamping assembly includes a second fixed member and a second moving member, the second moving member is movable relative to the second fixed member to clamp the product to be inspected.

7. The inspection apparatus of claim 6, wherein the clamping mechanism further comprises a sliding member and a rotating member, the first moving member is slidably connected to the body via the sliding member and is movable relative to the first fixing member to clamp the product to be inspected, and the second moving member is rotatably connected to the body via the rotating member and is movable relative to the second fixing member to clamp the product to be inspected.

8. The detecting apparatus according to claim 7, wherein the clamping mechanism further includes a first stopper and a second stopper, the first stopper is slidably connected to the body, the first stopper is used to limit a position of the first moving member moving in a direction away from the first fixing member, the second stopper is slidably connected to the body, and the second stopper is used to limit a position of the second moving member moving in a direction away from the second fixing member.

9. The detecting apparatus according to claim 8, wherein the body includes a first housing and a second housing, an accommodating space is formed between the first housing and the second housing, the sliding member, the rotating member, the first limiting member and the second limiting member are accommodated in the accommodating space, the first moving member extends from the accommodating space and is exposed to the second housing, and the second moving member extends from the accommodating space and is exposed to the second housing.

10. The detecting apparatus according to claim 8, wherein the detecting apparatus further includes a supporting plate, the supporting plate is provided with a through slot coaxially communicating with the through hole, a stopping portion is provided at one side of the supporting plate, the body is connected to the second driving assembly through the supporting plate, a first outer hole is provided in the body in the moving direction of the first limiting member, a second outer hole is provided in the body in the moving direction of the second limiting member, the first outer hole and the second outer hole are located at the same side of the body and are opposite to the stopping portion, and the stopping portion is configured to limit an extension amount of the first limiting member from the first outer hole and to limit an extension amount of the second limiting member from the second outer hole.